Download or read book U S Geological Survey Research in Radioactive Waste Disposal written by and published by . This book was released on 1991 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Geological Survey Research in Radioactive Waste Disposal written by Robert Schneider and published by . This book was released on 1983 with total page 256 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Geological Survey Research in Radioactive Waste Disposal written by George A. Dinwiddie and published by . This book was released on 1986 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Geological Survey Research in Radioactive Waste Disposal fiscal Year 1979 written by and published by . This book was released on 1982 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book US Geological Survey Research in Radioactive Waste Disposal written by Geological Survey (U.S.) and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Geological Survey Research in Radioactive Waste Disposal written by Robert Schneider and published by . This book was released on 1984 with total page 128 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book US Geological Survey Research in Radioactive Waste Disposal written by Geological Survey (U.S.) and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Geological Survey Research in Radioactive Waste Disposal Fiscal Year 1979 written by Geological Survey (U.S.) and published by . This book was released on 1981 with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Geological Survey Research in Radioactive Waste Disposal written by and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Joint U S Geological Survey U S Nuclear Regulatory Commission Workshop on Research Related to Low level Radioactive Waste Disposal May 4 6 1993 National Center Reston Virginia written by Peter Ryan Stevens and published by . This book was released on 1996 with total page 232 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S Geological Survey Research in Radioactive Waste written by Robert Schneider and published by . This book was released on 1982 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book U S GEOLOGICAL SURVEY RESEARCH IN RADIOACTIVE WASTE DISPOSAL FISCAL YEAR 1979 BY R SCHEIDER AND OTHERS written by Robert Schneider and published by . This book was released on 1982 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book US Geological Survey Research in Radioactive Waste Disposal Fiscal Year 1982 written by and published by . This book was released on 1984 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective is to determine present and past hydrologic regimes of the Nevada Test Site and vicinity in order to predict the potential for ground-water transport of radioactive waste from a proposed repository in Yucca Mountain to the accessible environment. Test drilling and hydraulic testing are being conducted in both the saturated and unsaturated zones to characterize in detail the hydrologic regimes of the Yucca Mountain area. Results will be used to interpret potential ground-water flow pathways and bulk hydrogeologic properties of unsaturated and saturated rocks, and to obtain information on the chemistry and age of the ground water. Progress is reported. 1 ref.

Download or read book Selection and Investigation of Sites for the Disposal of Radioactive Wastes in Hydraulically Induced Subsurface Fractures written by Ren Jen Sun and published by . This book was released on 1982 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Injection of intermediate-level radioactive wastes (specific activity of less than 6 x 103γCi/mL, consisting mainly of radionuclides, such as strontium and cesium, having half-lives of less than 50 years) mixed with cement into a thick shale formation is a promising and feasible disposal method. Hydraulic fracturing provides openings in the shale to accommodate the wastes. Ion exchange and radionuclide-adsorption materials can be added to the grout during mixing to further increase the radionuclide-retaining capacity of the grout. After solidification of the grout, the injected wastes become an integral part of the shale formation, and therefore the wastes will remain at depth and in place as long as the injection zone is not subjected to erosion or dissolution. Problems concerning safety of the disposal method are (1) the potential for inducing vertical fractures, (2) phase separation during and after the injections, (3) the reliability of methods for determining the orientation of induced fractures, (4) the possibility of triggering earthquakes, and (5) radionuclides being leached and transported by ground water. In bedded shale, a difference between tensile strength normal to and that parallel to bedding planes favors the formation of fractures along bedding planes that are nearly horizontal. Even in areas where vertical stress is slightly greater than the horizontal stresses, nearly horizontal bedding-plane fractures can be hydraulically induced in shale at depths less than 1,000 meters. Test injections should be made during site evaluation to determine if horizontal bedding-plane fractures can be induced. The orientation of induced fractures can be indirectly monitored by recording injection pressures during injection time and by measuring the decay of water injections and the uplift of ground surface after the injections; however, it can be directly determined by gamma-ray logs made in observation wells before and after each injection, if the injected fluid or wastes contain enough gamma-ray emitting radionuclides. If waste grout is properly mixed, phase separation should be less than one percent of the total amount injected. The mobility of waste in the separated liquid is further decreased by the low permeability (less than 10−6 darcy) and the large ion-exchange and adsorption capacity of shale, which thus reduce the potential for contamination. Grout injections do not cause extensive increases in pore pressure within shale, and a disposal site should be located in a geologically stable and tectonically relaxed area, that is, an area lacking local active faults. Thus a disposal in shale in such areas can avoid the two necessary and essential conditions for triggering earthquakes by fluid injections, an increase in pore pressure and rock already stressed near its breaking strength. Waste injections are made in several stages at different levels through an injection well. After the first series of injections at the greatest depth, the well is plugged by cement at that depth. The second series of injections are made a suitable distance above the first. The repeated use of the injection well distributes the cost of constructing injection and monitoring wells over many injections, thereby making hydraulic fracturing and grout injection economically attractive as a method for the disposal of radioactive wastes. Theoretical considerations about inducing nearly horizontal beddingplane fractures in shale are discussed, as are field procedures for site selection, safety, and the monitoring and operation of radioactive waste disposal. Case histories are used as examples to demonstrate the application of the theory and techniques of field operations.

Download or read book Bibliography of Reports by U S Geological Survey Personnel on Studies of Underground Nuclear Test Sites and on Waste Management Studies at the Nevada Test Site and the Waste Isolation Pilot Plant Site New Mexico January 1 1983 to December 31 1984 written by V. M. Glanzman and published by . This book was released on 1985 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Safe Disposal of Radionuclides in Low level Radioactive Waste Repository Sites written by Geological Survey (U.S.) and published by . This book was released on 1990 with total page 140 pages. Available in PDF, EPUB and Kindle. Book excerpt: See journals under US Geological survey. Circular 1036.

Download or read book Geologic and Hydrologic Studies by the U S Geological Survey on Water Supply and Disposal of Radioactive Waste on Behalf of the Division of Reactor Development U S Atomic Energy Commission written by Geological Survey (U.S.) and published by . This book was released on 1958 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: